Everyone Struggles to Survive Under the Sea, but My Submarine Evolves Without Limit

One day, tens of billions of people woke up plunged into a deep-sea survival game. Everyone started with a submersible. While others huddled trembling in diving suits, glass boats, or battered metal cans, praying not to catch the eye of a mutant fish, Su Hai calmly took his seat in the cockpit of a military submarine. The Daily Intelligence System was bound to him. From that moment on, the deep sea held no secrets from him. While others blundered through the darkness, he had a map. While monsters ambushed others, he laid traps in advance. While others fought to the death over a crate of supplies, he was already on his way to raid the next S-rank ruin. [Engine] + [Nuclear Power]... A deep-sea fortress that never shuts down. While others ran out of power after three days and waited to die, his vessel cruised at full speed all year round. [Torpedo Tubes] + [Infinite Replication]... Fire a torpedo, and a new one would automatically appear seconds later. The firepower of his lone submarine rivaled an entire fleet. [Hull] + [Eternal Durability]... A mutant shark chipped every tooth trying to bite it, yet the hull didn't even have a white mark. When a colossal deep-sea beast struck it with a tentacle, the tentacle broke. While other players killed each other for half a bottle of oxygen and went insane from claustrophobia... Su Hai lounged on a leather sofa in the panoramic observation cabin, enjoying vegetables freshly picked from his underwater garden while watching a colossal deep-sea beast ram his submarine in a frenzy. He set down his chopsticks and said calmly, “Had enough? My turn.” Beneath the deep sea, he was the calamity. From [Lv. 1 Rusty Submarine] to [Lv. 100 Mechanical Calamity].